.sure {
    position:fixed;
    left: 40%;
    top: 40%;
    width: 200px;
    height: 100px;
    padding: 20px;
    text-align: center;
    background-color: rgba(0, 255, 255, 0.61);
    /* z-index: 999; */
    border: 1px solid black;
    display: none;
    }
